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		| Paper: | 
		A Search for Compact Radio Sources Toward the Center  of the Galaxy | 
	 
	
		| Volume: | 
		528, New Horizons in Galactic Center Astronomy and Beyond | 
	 
	
		| Page: | 
		171 | 
	 
	
		| Authors: | 
		Sukehiro, S.; Fujisawa, K.; Yonekura, Y. | 
	 
	
	
		| Abstract: | 
		According to a hypothesis of the formation process of supermassive black holes in the center of galaxies, a possibility that massive black holes are taken in by galactic merger has been proposed. We aim to discover small- or medium-mass black holes floating in the central region of the galaxy which have not merged yet.  We have made VLBI observation to 84 compact radio objects with size smaller than 5 arcsecond selected from the surveys of the Galactic center region by VLA. So far, 16 objects have been detected and the objects have brightness temperature larger than 106 K. | 
	 
	
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